Independent guidance.
Visible source work.

What this site contributes

The guides connect installation source, profile data and troubleshooting choices. The aim is to make the consequences of an action clear before you take it, and to give you a recognizable result or a useful stopping point.

Mozilla remains the source of product documentation. Firefox Updates is independent and is not affiliated with or endorsed by Mozilla. It does not provide browser installers or operate Mozilla Support.

Who writes and checks the guides

The publisher display name is Firefox Updates. Content is produced with AI assistance under the role aliases Firefox Updates Editorial Desk and Firefox Updates Verification Desk. These are editorial roles, not people with professional credentials, and no human review is claimed.

Primary documentation was checked on 7 October 2026, with selected backup, diagnostic and extension references rechecked on 8 October. Each reference carries its actual check date. Source checking and the controlled experiments are identified separately in each guide. Browser-menu instructions are documentation-checked; bookmark state was tested through Firefox’s core APIs. Built-in Backup, Sync accounts, Refresh and safe-mode restarts were outside those experiments. Five automated Firefox experiments used disposable Windows profiles and fake data: bookmark replacement, profile copying, a different-profile comparison, a deliberately changed preference, and an authored demonstration extension. The test engine was Playwright-patched Firefox 155.0. Read the recorded results and scope.

Scope and maintenance

The current collection covers desktop installation ownership, channel decisions, bookmark and profile data, diagnostic methods, one-site problems, extension functions and advisory interpretation. Mobile procedures, current vulnerability monitoring and release-by-release news are outside this edition’s scope.

Availability and menu labels can vary. Recheck the linked official instructions before a consequential change. A new release alone does not make an evergreen explanation out of date; an actual change to its advice does.

Corrections and support

Sources are listed beside the relevant advice and at the end of each guide. For help with your installation, use Mozilla Support. Do not post private profile files, passwords or browsing histories in a public report.

If an instruction no longer matches your installation, check its linked official source and note your running version and platform. The source dates and test boundaries show what was checked for this edition.

Data and commercial relationships

This edition uses no analytics, advertising, forms that submit data, or affiliate links. Search, guide choices and the support-record tool run in the page without saving or transmitting your entries. The copy button writes a record to your clipboard only when you choose it. The site requests its own assets only; following an external source link takes you to that provider.